ES2808915T3 - Morse cone protective sleeve - Google Patents

Abstract

Device for providing protection against contamination of a conical contact surface with blood or tissue particles present in a surgical wound, the device comprising: a hollow flexible conical sleeve (1) adapted to be applied on said conical contact surface, wherein said conical contact surface is a male Morse taper (6); a circular flange (2), wherein said circular flange (2) is firmly attached to the outer surface of the narrow upper end of said hollow flexible conical sleeve (1) characterized in that said hollow flexible conical sleeve (1) It is constructed from a soft, flexible, extensible, and malleable polymeric material, such as silicone, rubber, and other soft, flexible polymers.

Description

DESCRIPTION

Morse cone protective sleeve

The present invention is defined in claim 1 and relates to a device for providing protection against contamination of a conical contact surface, the device comprising a new orthopedic protective sheath adapted to be applied to the male part of a Morse taper of an implant of orthopedic joint replacement.

BACKGROUND OF THE INVENTION

In the orthopedic joint replacement field, it is fairly conventional for implants to have modular components to offer the surgeon various sizes and fit a different anatomy. The surgeon assembles these components in the operative wound. The Morse taper has been used as an easy and strong mechanical means to assemble different components simply by inserting the male taper into the female taper with an impact. This technique still involves the assembly of the components in situ after the insertion of the largest component first.

Furthermore, during the component assembly process there is a great risk of contaminating the male and female conical contact surfaces of the implant with blood and other body fluids, as well as tissue particles present in the surgical wound. This contamination has caused electrochemical corrosion which has caused local inflammation of the tissue and osteolysis, which has required extensive revision procedures. It is well known that fluid and materials trapped between the male and female cone mating surfaces have been to blame for initiating the corrosive process and the release of metal hydrites.

US Patent No. 5,047,061 describes a prosthesis holder for retaining a prosthesis in the desired position relative to the femoral canal of a femur during surgery. The holder comprises an element of a clamping unit specially adapted for positioning in cooperative association with the neck of the prosthesis to provide improved clamping, protection and positioning characteristics to the holder.

DESCRIPTION OF THE INVENTION

The present invention finds application in any orthopedic implant that uses a Morse taper to assemble its components. It serves to remove contamination of the Morse taper contact surfaces with blood and body fluids, as well as tissue debris present in the surgical field. Such cellular debris and fluids have been implicated in the generation of bimetallic electrolyte processes and the subsequent release of harmful metal hydrides that lead to a local cellular reaction and ultimately osteolysis. More specifically, the invention, in its broadest concept, relates to a removable, disposable protective sheath as defined in claim 1 applied to the male conical component of an implantable device.

The general purpose of the present invention, which will be described in greater detail later, is to provide a new removable and disposable sleeve to protect the male tapered end of an implant during a surgical implantation procedure. The new protective sleeve has many advantages, which are not contemplated, not obvious, not suggested, or even implied by any of the above techniques. To achieve this, the present invention, as defined in claim 1, comprises a sleeve having a conical shape and a diameter equal to the male Morse taper of the implant and a circular rim located at the upper narrow end of the sleeve. The lip is firmly attached to the sleeve and has an opening centered at the top end to allow the male Morse taper to slide. Said circular rim is located in a horizontal plane and orthogonal to the longitudinal axis of the conical protective sleeve.

In addition, the outer surface of the protective sleeve has a plurality of vertically located grooves (release slots) that allow the surgeon to easily remove the sleeve after assembling the male and female Morse taper components. Thus, the most important features of the invention have been explained in a rather broad manner so that the detailed description thereof may be better understood, and so that the present contribution to the art may be better appreciated.

The sheath comprised in the device of the invention is constructed from a flexible, extensible and malleable material, such as silicone, rubber, and other soft and flexible polymers.

There are additional features of the invention which will be described later. To this end, before explaining in detail at least one embodiment of the invention, it should be understood that the invention is not limited in its application to the details of the configuration and arrangement of the components that are explained in the following description or illustrated in the drawings.

The invention involves other embodiments and can be practiced and carried out in various ways. For example, the protective sleeve may be oval in shape rather than round if the protective sleeve is used with dual tapered stems where the male Morse taper has an oval rather than round cross section. Furthermore, it should be understood that the phraseology and terminology employed herein are for the purpose of description and should not be considered limiting. A main object of the present invention is a disposable removable protective sleeve that eliminates contamination of the male Morse taper of an implant, thus eliminating the risk of electrochemical and friction corrosion that occurs due to the interposition of blood and tissue debris between the surfaces. cone male / female contact point. Additionally, the male Morse taper can be coated with a metallic catalyst such as palladium, which reduces corrosive reactions and metallic hydrites. The sheath of this invention will protect the thin metal film during surgical insertions and manipulations.

In order to carry out the foregoing and related objects, this invention may be carried out in the manner illustrated in the accompanying drawings, although the fact that the drawings are illustrative only and that variations can be made to the specific illustrated configuration is emphasized. .

BRIEF DESCRIPTION OF THE DRAWINGS

Other objects, features, and inherent advantages of the present invention will be fully appreciated as it is better understood when considered in conjunction with the accompanying drawings, in which like reference symbols designate the same or like elements throughout. , and in which: Figure 1 is a perspective view of the protective sleeve.

Figure 2 is a vertical sectional view of the sleeve and a removable top flap seal. Figure 2a is a horizontal cross section of the sheath at a level A.

Figure 3 is a perspective view of the sleeve arranged on the male Morse taper.

Figure 4 is a perspective view of the protective sleeve that is removed during assembly.

DETAILED DESCRIPTION OF THE INVENTION

It turns now descriptively to the drawings, in which like reference symbols denote like elements throughout the various views.

A greater appreciation of an embodiment of the invention will be obtained with reference to Figure 1 in which a conical sleeve 1 is shown in perspective which has a circular rim 2 and a central channel 3. Furthermore, the outer surface of the protective sleeve incorporates a plurality of vertical release grooves 5 (see figures 1 and 2a), which will separate and open widely during assembly as the female cone 10 of articular ball 8 is pushed down (see figure 3) on the male cone 6 (see figure 4). The upper surface of the edge 2 can be flat or concave to better accommodate the curved surface of the articular ball 8 (see Figure 4). A removable sealing cover flap 4 (see Figure 2) is firmly attached to the upper surface of the edge 2 using a contact adhesive. Said fin will keep the inner surface of the protective sleeve and the metallic surfaces of the cone free from contamination of blood or other tissues.

In use, the surgeon inserts the implant in the proper position in the desired bone. The Morse taper of the implant is already covered by the protective sleeve, which remains in place during the surgical insertion process until the implant stem is fully seated. This keeps the Morse taper clean by preventing contamination with blood, other body fluids, and tissue particles. The surgeon will then detach the sealing cover flap 4 exposing the top 6 of the male Morse taper. At this point, the surgeon will seat the ball joint 8 (see Figure 3) on edge 2 and insert the tip of the male Morse taper 6 onto the female Morse taper 10 of the ball joint. The downward impact of the articular ball during assembly will push the edge and the protective sleeve sliding distally towards the neck 7 (figure 4) of the implant. The larger diameter of the neck 7 will cause the protective sleeve to open distally into the release slots 5 and be easily removed by the surgeon once the ball joint is fully seated.

A novel device has therefore been described to protect the male Morse taper of an orthopedic implant during a surgical insertion and eliminate the risk of contamination of the contact surfaces by blood, body fluid and tissue particles present in the wound. surgical and responsible for electrochemical bimetallic corrosion that frequently requires removal and revision of the implant.

Claims (6)

1. Device for providing protection against contamination of a conical contact surface with blood or tissue particles present in a surgical wound, the device comprising: a hollow flexible conical sleeve (1) adapted to be applied on said conical contact surface, wherein said conical contact surface is a male Morse taper (6); a circular flange (2), wherein said circular flange (2) is firmly attached to the outer surface of the narrow upper end of said hollow flexible conical sleeve (1) characterized by the fact that said hollow flexible conical sleeve (1) is constructed from a soft, flexible, extensible and malleable polymeric material, such as silicone, rubber and other soft and flexible polymers. Device according to claim 1, characterized in that the outer surface of said hollow flexible conical sleeve (1) has a plurality of vertical grooves (5) along its entire length. Device of claim 2, characterized in that said vertical grooves (5) extend proximally towards said circular rim (2). Device according to claim 1, characterized in that said hollow flexible conical sleeve (1) is a right cylinder having the same length as the conical contact surface. Device of claim 1, characterized in that said hollow flexible sleeve (1) provides protection to a thin metallic coating film applied on said conical contact surface. Device according to claim 1, characterized in that the hollow flexible conical sleeve (1) can be separated so that, when an articular ball (8) of an orthopedic implant applies a downward thrust, the circular rim (2) forms a tight seal with the articulating ball (8) and the separable hollow flexible conical sleeve (1) will separate and begin to slide, preventing contamination of the male Morse taper (6) as the articulating ball (8) mounts to male Morse taper (6).